Headboard



FIG. 1 is a top, front and left side perspective view of a new design of a headboard;

FIG. 2 is a front view of thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view and a right side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines show environmental structures or boundaries that form no part of the claimed design. 

CLAIM The ornamental design of a headboard, as shown and described. 